A new NBC News/SurveyMonkey tracking poll finds Donald Trump still leads the GOP field nationally with 35%, followed by Ted Cruz at 20%, Marco Rubio at 17%, Ben Carson at 7%.
Key finding: “While Trump still leads by 15 percentage points, his support has dropped in the past week as Rubio has risen 5 points. The remainder of the field has been relatively stagnant.”
In the Democratic race, Hillary Clinton leads Bernie Sanders, 51% to 39%.

